A figure-8 blank (also called a Spectacle Blind Flange) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar.
| NPS | Inside Diameter, B | Outside Diameter, O | Centerline Dimension, A | Thick-ness, t | Web Width, W | Approximate Weight kgs | |
| 1/2 | 16 | 67 | 90 | 9.7 | 38 | 7 | 1.40 |
| 3/4 | 21 | 73 | 95 | 9.7 | 41 | 7 | 1.62 |
| 1 | 27 | 83 | 110 | 9.7 | 64 | 7 | 2.20 |
| 1 1/4 | 35 | 102 | 130 | 12.7 | 64 | 7 | 3.54 |
| 1 1/2 | 41 | 114 | 145 | 15.7 | 70 | 7 | 4.87 |
| 2 | 53 | 143 | 170 | 15.7 | 70 | 7 | 7.29 |
| 2 1/2 | 63 | 165 | 195 | 19.1 | 76 | 7 | 10.73 |
| 3 | 78 | 194 | 230 | 22.4 | 76 | 7 | 16.15 |
| 4 | 102 | 232 | 275 | 28.4 | 89 | 7 | 26.46 |
| 5 | 128 | 276 | 325 | 35.1 | 89 | 7 | 42.51 |
| 6 | 154 | 314 | 370 | 41.1 | 89 | 7 | 60.70 |
| 8 | 198 | 384 | 440 | 53.8 | 102 | 7 | 108.94 |
| 10 | 248 | 473 | 540 | 66.5 | 114 | 7 | 194.86 |
| 12 | 289 | 546 | 620 | 79.2 | 114 | 7 | 298.68 |
